[ITK] [ITK-users] Geodesic level set error

[Sindhoor Bhat]

Hi nicgallego,
Thanks for reply.
I've read that section. Here is some detail on steps i followed. This may help you to give some hints.

1.read dicom series
2.define region of interest (ROI filter)
3. compute gradient & speed image.
4.Set seed using fast marching filter.
5.Give this inital level set image---- to geodesic segmentation filter

  geodesicActiveContour->SetInput(  fastMarching->GetOutput() );
  geodesicActiveContour->SetFeatureImage( sigmoidFilter->GetOutput() );

  fastMarching->SetOutputSize(roi_filter->GetOutput()->GetBufferedRegion().GetSize() ); //roi=region of interest


 Even after reading from same dicom series, why is this error? it should have same origin / spacing right?
 can you pls help me ?
  


On Tuesday, 17 June 2014 12:59 PM, Nicolas Gallego <nicgallego at gmail.com> wrote:
 


Good morning Sindhoor,

In general itk pipelines process images in the physical space, so that pixelwise operations are between samples on the same physical position.
Section 4.1.4 of the Software guide [1] and its correspondent example (Image4.cxx) may help you,

[1] http://www.itk.org/ItkSoftwareGuide.pdf



Nicolás Gallego-Ortiz
Université catholique de Louvain, Belgium



2014-06-17 7:28 GMT+02:00 Sindhoor Bhat <bhatsindhoor at ymail.com>:

Dear Matt,
>
>
>I've got error in Geodesic active contour level set segmentation :  saying
> itk::ERROR: GeodesicActiveContourLevelSetImageFilter(0000000004AC7160): Inputs do not occupy the same physical space! 
>
>
>I searched a lot on solving this error. but none have replied. Can you pls tell how to solve this error?
>(I'm trying to segment 3D dicom images)
>
>
>thank you.
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